Choose the correct answers from the alternatives given. Cyanobacteria, unlike other types of bacteria that photosynthesize, do:
A
not have a cell wall
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B
not have chlorophyll
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C
give off oxygen
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D
not give off oxygen
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Solution
The correct option is C give off oxygen
Cyanobacteria, also called blue-green algae, were among the earliest organisms on Earth. These primitive bacteria produce oxygen during photosynthesis as they fix CO2 dissolved in the water. So the correct option is 'Give off oxygen’.